Fountain-pen.



J. BLAIR.

FOUNTAIN PEN.

APPL-loulou FILED 11011.16, 1910.

Patented 0G13. 17, 1911.

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UOLUMBIA PLANOURAPH CD., WASHINGTON, D. c.

I TTS ATEN'I QITIPICE.

JOI-IN BLAIR, OF "NEW YORK, N. Y.

FOUNTAIN-PEN.

Specification of Letters Patent.

Application filed November 16, 1910,

Patented 0615.17, 1911.

Serial No. 592,614.

To all whom 'it may concern:

Be it known that I, JOHN BLAIR, a citizen of the United States, residingat New York city, Brooklyn, county of Kings, and State of New York, haveinvented new and useful Improvements in Fountain-Pens, of which thefollowing is a specification.

This invention relates to a fountain pen of novel construction, and moreparticularly to ei'l'lcient means for preventing any objectionableovercharging of the barrel with ink during the filling operation.

In the accompanying drawing: Figure 1 is a longitudinal section partlyin side view of a fountain pen embodying my invention; F ig. 2 alongitudinal section with the cap reversed; Fig. 3 a plan of the feedbar, and Fig. et an enlarged cross section on line 4-11, Fig. 3.

Into the reduced lower end 10 of the barrel 11, is removably fitted thefeed bar 12, which projects outwardly beyond the barrel. The pen point13 is introduced between the barrel and the feed bar and abuts against ashoulder 14 of the former as shown.

The feed bar is circular in cross section, and has a lower front bevel15, so that the bar runs out into a sharp edge. W'ithin the upper sideofthe bar, there is formed a centrally disposed longitudinal feed groove16 which extends from the upper edge of the bar to a point somewhatabove the lower edge, so that the groove is here closed.

Along the lower portion of bar 12, groove 16 is flanked by a pair ofparallel longitudinal slits 17 which are placed at some distancelaterally from groove 16, and do not communicate directly therewith.Slits 17 at their upper end commence preferably at a point somewhatbelow the middle of the feed bar, while at their lower end, they are cutentirely through the lower beveled edge of said bar and extend throughthe extreme lower end.

In writing, the ink flowing down groove 16 will be checked by the lowerclosed end thereof and will consequently overflow the feed bar at bothside-s. In this way the ink will be carried to slits 17, along which itwill freely descend, so that a supplementary supply of ink is furnishedto the pen point when the writer is doing heavy shading.

The upper end of barrel 11 is interiorly threaded for some distance asat 18, and is engaged by an upper threaded plug 19, which closes the topof the barrel. At a distance from said plug, there is contained withinbarrel 11, a second threaded plug or disk 20, that also engages thread18, and is so located that an air chamber 21 is formed between theplugs. The engagement of plugs 19, 20 with barrel 11 is not air tight,but somewhat loose and permits air to be sucked from the lower inkchamber 22 of the barrel around plug 20 through chamber 21, and thenceout around plug 19.

The cap 23 of the pen may be iitted in the usual manner, either over theupper or lower end of the barrel. It is provided at one side with a vent24, which is arranged at such a distance from the end of the cap, thatwhen the latter is projected over the pen point, the vent will belocated above a joint 25 formed between the lower end of barrel 11 andcap 23. In this way air is effectively excluded from the pen point andthe lower end of the barrel, when the pen is carried about.

To till the pen, the lower end thereof is dipped into an ink well, plug19 is slackened, and cap 23 is projected over the upper end of thebarrel. The cap is now slowly reciprocated along the barrel a few times,vent 24: being closed by the thumb during the upstroke and opened duringthe downstroke. In this way the ink will be pumped into chamber 22, andwill be held against overiiowing by disk 20. That is to say, when thepumping operation is unduly prolonged, the flow of the ink will bechecked by disk 20, so that it cannot enter chamber 21 in anyappreciable quantity or ooze out around plug 19. Any objectionableoveriiow ofink is thus prevented and cleanliness is insured. Disk 20 isnicked as at 26 so that it may be readily grasped and secured inposition and that it may be so adjusted Within barrel l1, that therelative size of ink chamber 22 and air Chamber 21, may be varied.

I claim:

1. A fountain pen Comprising a barrel having an inner thread, a plugclosing the upper end of the loarrel7 and an inner disk loosely threadedWithin the barrel to permit a passage of air While checking asimultaneous passage of ink.

2. A fountain pen comprising a barrel having an upper threaded end, anouter plug and an inner disk, both loosely threaded Within the barrel topermit a passage 0f air While checking a simultaneous passage of 13 ink.

JOHN BLAIR. Witnesses:

FRANK v. BRIESEN, KATHERYNE KOCH.

Gopies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

